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How do blockchain nodes communicate?

How to connect to Ethereum network In order to connect to the Ethereum Network, you need a special program called Geth. Geth is a command line interface that allows you to interact with the Ethereum network through your computer terminal or command prompt in a similar way as using a web browser. To install it on your device, follow these steps: 1) Download and install either manually or by using an installer from https://geth.ethereum.org/downloads/; 2) Set up your account details for getting ETH (Ether). You can do this by typing “personal.newAccount();” at the geth console or by going into "Settings" > "Accounts". Remember that all transactions are final so be sure not to send or recive ETH to/from any accounts that you may not own! That is the equivalent of sending cash in the mail with no way of recovering it; 3) Save your file path. If you are running geth on Windows, you can sign into mist through "Settings" > "RPC Console". Enter